Fig. 2From: Development of bark-based adhesives for plywood: utilization of flavonoid compounds from bark and wood. IIThe ratios of the PF resin (solids), bark particles and water in bark particle adhesives. “PF resin” and “P” indicate phenol–formaldehyde resin. “RP Bark” and “B” indicate the bark particles (< 63 µm). “F” indicates wheat flour. “CF-A” means “Commercial formulation A” and refers to the formulation of a commercial adhesive for plywood using PF resin A. It consists of PF resin, inorganic components such as calcium carbonate and waterBack to article page